I agree with Joyce. The killer application of small components may be INSIDE the circuit board. IPC is closely watching the development of specs for placed embedded components, including silicon die, inside circuit boards. Japan is way ahead of the US in this technology. Effective use of embedded components depends on microvias - not nearly as widely used in North America as in Asia. My recent quick look says that only a few percent of the microvia drills in the world are located in North America.
Denny Fritz
-----Original Message-----
From: Joyce Koo <[log in to unmask]>
To: TechNet <[log in to unmask]>
Sent: Fri, Nov 18, 2011 9:55 am
Subject: Re: [TN] Success using 01005 parts?
Respectively disagree: any technology that at its infancy are always difficult
due to (1) tooling limitation, (2) inspection limitation and (3)
nfrastructure to deploy the technology and supply chain issues (quality,
onsistency, etc.). Utilization of its full potential is depend upon designer's
nderstanding of above mentioned limitations and overcome its shortcomings
remind me when 1st COB was done by eye ball placement on the cleanroom floor.
plit prism and X-ray inspection were not there yet). On the other hand, the
1005 provide flexibility for the design to use off the shelf devices that could
e small (next gen), low profile, next to CSP type. But integrated passive to
ackages may provide more elegant solution. My 1.96 cents.
jk
-----Original Message-----
rom: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
ent: Friday, November 18, 2011 9:26 AM
o: [log in to unmask]
ubject: Re: [TN] Success using 01005 parts?
I agree. Smaller size does provide advantages, but at what cost? The gain of .2
q. inches in size reduction value is but a fraction of the additional assembly
nd rework costs, not to mention reductions in reliability.
-----Original Message-----
rom: Phil Nutting [mailto:[log in to unmask]]
ent: Friday, November 18, 2011 8:12 AM
o: TechNet E-Mail Forum; Stadem, Richard D.
ubject: RE: [TN] Success using 01005 parts?
It seems everything is always improved. Computers get faster, cars are more
omplicated, drugs are more powerful, etc. So it would follow that we need to
eep reducing the size of components, just because we have the technology and
ot because it is necessary. So while I watch this thread it strikes me that
he next "big thing" will be 0050025 to take us to next level of ridiculous.
Just a Friday musing.
Phil Nutting
-----Original Message-----
rom: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
ent: Friday, November 18, 2011 8:05 AM
o: [log in to unmask]
ubject: Re: [TN] Success using 01005 parts?
It does, but in most cases is not needed.
-----Original Message-----
rom: TechNet [mailto:[log in to unmask]] On Behalf Of Eric Christison
ent: Friday, November 18, 2011 3:38 AM
o: [log in to unmask]
ubject: Re: [TN] Success using 01005 parts?
"There is no need for such a small size except perhaps in medical applications
r certain phone or special communications equipment.."
Which of course accounts for several hundred million PWB assys every year
=)....
egards,
On 17/11/2011 21:25, Stadem, Richard D. wrote:
Yes. There is no need for such a small size except perhaps in medical
pplications or certain phone or special communications equipment. (Implants,
earing aids, etc.). The other consideration is where an absolute minimum of
eat can be tolerated.
-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Thursday, November 17, 2011 3:13 PM
To: TechNet E-Mail Forum; Stadem, Richard D.
Subject: RE: [TN] Success using 01005 parts?
Hi Mike,
I always argued that 01005 parts did not actually save enough space to
make them worth using (and won). It is certainly true that they do not
save half the space even though they are thought of as half the size.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Thursday, November 17, 2011 12:37 PM
To: [log in to unmask]
Subject: Re: [TN] Success using 01005 parts?
What specific problem are you having? Wetting, tombstoning, placement
issues?
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Michael R. Floyd
Sent: Thursday, November 17, 2011 1:52 PM
To: [log in to unmask]
Subject: [TN] Success using 01005 parts?
Hello All:
Has anyone had any great success soldering 01005 parts? We have not.
Our manufacturing department has had us lowly pcb layout guys try about
every pad configuration/footprint layout to try and come up with one
that works well, reliably. We have used part& stencil manufacturer's
recommendations etc...etc....etc.... Nothing has seemed to work very
well.
If you have had success, do you mind sharing your secret?
Please share your knowledge of:
PCB Footprint (pad sizes, pitch, mask or no mask between pads etc...)
Solder paste stencil opening size
Type of solder paste
Thickness of stencil
Reflow parameters (time, temp etc...)
Being that I am not a mfg. guy, I am sure that there may be a lot more
information that we need in order to be successful. I figured TechNet
would be as good a starting point as any for gathering the needed
information. The vast amount of knowledge, experience and comments that
are shared on this forum, never ceases to amaze me.
Thank you in advance for your suggestions, comments and horror stories.
Sincerely,
Mike
Michael Floyd
CAD/CAM Engineer
Office Address:
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